JP4327374B2 - Plug for electric kotatsu - Google Patents

Plug for electric kotatsu Download PDF

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Publication number
JP4327374B2
JP4327374B2 JP2001076896A JP2001076896A JP4327374B2 JP 4327374 B2 JP4327374 B2 JP 4327374B2 JP 2001076896 A JP2001076896 A JP 2001076896A JP 2001076896 A JP2001076896 A JP 2001076896A JP 4327374 B2 JP4327374 B2 JP 4327374B2
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Japan
Prior art keywords
fuse
installation recess
cap member
gripping
cylindrical
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Expired - Lifetime
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JP2001076896A
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JP2002276951A (en
Inventor
誠治 川合
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Metro Denki Kogyo Co Ltd
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Metro Denki Kogyo Co Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、電気コンセントへ差し込んで電気こたつの発熱体へ商用電源を供給するための差込プラグに関するものである。
【0002】
【従来の技術】
従来より、過負荷や短絡等による過電流から電線および電気機械器具の損傷をを防止するために、家庭の電気配線においては、分電盤等に、ブレーカ、ヒューズが取り付けられている。また、電気こたつにおいては、発熱体(電熱部)本体には、過熱防止用の温度ヒューズが取り付けられているが、電源コードには、過負荷や短絡等による過電流防止用の電流ヒューズが取り付けられていない。
【0003】
【発明が解決しようとする課題】
しかしながら、一般家庭の分電盤に取り付けられたブレーカやヒューズは、個々の家庭用電気機器の電気容量より規模の大きい過電流がなければ遮断されないため、電気こたつのように、コードが老朽化し易く、僅かな短絡を起こし易い電気機器においては、過電流による損傷を効果的に防止することができない。
【0004】
本発明の目的は、電気こたつのコードが僅かに短絡して微少な過電流が生じた場合でも、敏感に反応して回路を遮断し、過電流によるスパークを最小限に防止することができる電気こたつ用の差込プラグを提供することにある。
【0005】
【課題を解決するための手段】
かかる本発明の構成のうち、請求項1に記載された発明の構成は、電気こたつの発熱体へ商用電源を供給するための金属製の端子を合成樹脂製のケースで被覆してなる差込プラグであって、前記ケースが、筒形ヒューズを嵌め込むための設置凹部を設けたケース本体と、前記設置凹部の開口部を覆うように取り付けられるキャップ部材とからなり、前記設置凹部内にヒューズホルダを設け、前記筒形ヒューズの上下端縁際を前記ヒューズホルダで把持することによって前記筒形ヒューズを前記設置凹部内に装着可能とするとともに、前記設置凹部内で前記ヒューズホルダの左右外側に前記キャップ部材の左右端縁部が当接可能な一対の段部を設ける一方、前記キャップ部材を、前記設置凹部の開口部と略同一形状に形成するとともに、その内側に、前記筒形ヒューズを把持可能な把持突起を設け、前記筒形ヒューズを前記ヒューズホルダに把持させて前記設置凹部内に装着し、その前記筒形ヒューズを前記把持突起で把持することにより、前記キャップ部材がその左右端縁部を前記段部の前面に当接させた状態で前記開口部を覆うように取り付けられ、前記筒形ヒューズが前記ケース内に内蔵されることにある。なお、電流ヒューズがスイッチON時の突入電流を過敏に検知して溶断する事態を防止するため、耐ラッシュ型の電流ヒューズを用いることが好ましい。
【0006】
【発明の実施の形態】
以下、本発明の電気こたつ用差込プラグ(以下、単に差込プラグという)の一実施形態について、図面に基づいて詳細に説明する。
【0007】
図1、図2は、差込プラグを示したものである。差込プラグ1は、金属製の端子2a,2b、絶縁体であり弾性を有する合成樹脂によって形成されたケース3、筒形ヒューズ4等によって構成されており、平行に配置された一対の端子2a,2bの基端部分の周囲を、ケース3が被覆した状態になっている。
【0008】
ケース3は、端子2a,2bの露出側の端縁を幅狭に形成したケース本体5と、扁平なキャップ部材6とによって構成されている。ケース本体5は、略中央の部分を縦長に深く刻設することによって設置凹部7が設けられている。また、設置凹部7内には、金属製のヒューズホルダ8,8が上下一対に突設されており、それらの各ヒューズホルダ8,8においては、円弧状の把持片13,13が、間に円を形成するように向かい合った状態になっている。そして、それらのヒューズホルダ8,8によって、筒形ヒューズ4が着脱自在に設置されている。さらに、設置凹部7内の各ヒューズホルダ8,8の外側には、段部14、14が形成されている。
【0009】
一方、キャップ部材6は、合成樹脂によって、設置凹部7の開口部と略同一の形状に一体的に形成されている。そして、内側の中央には、略円弧状の2つの把持突起11,11が、幅方向に沿って隣り合うように突設されており、間に円を形成するように向かい合った状態になっている。かかるキャップ部材6は、把持部材11,11によって設置凹部7内に設置された筒形ヒューズ4を把持することによって、ケース本体5に着脱自在に取り付けられている。そして、キャップ部材6が、裏面の左右の端縁際を設置凹部7の段部14,14の前面に当接させ、設置凹部7の開口部際に嵌め込まれた状態で、ケース本体5の設置凹部7の開口部を覆った状態になっている
【0010】
一方、図3は、差込プラグ1の電気回路を示したものであり、差込プラグ1においては、ケース3に内蔵された筒形ヒューズ4が、片側の端子2aと直列に接続された状態になっている。
【0011】
上記差込プラグ1は、図4の如く、電気こたつ用の電気コード12内の電線を各端子2a,2bに接続させた状態で、電気コード12の先端に取り付けられて使用される。なお、差込プラグ1と反対側の端縁には、電気こたつの発熱体と接続するための接続部材13が設けられており、中央には、電気こたつの発熱体の温度調節をするコントローラが設置されている。かかる電気コード12が使用された電気こたつにおいては、長期間の使用により電気コード12が損傷して、電気コード12の内外で電線が僅かに短絡した場合(すなわち、家庭の分電盤のヒューズが溶断しない程度に短絡した場合)でも、微少な過電流を筒形ヒューズ4が敏感に検知して直ちに溶断する。
【0012】
差込プラグ1は、上記の如く、合成樹脂製のケース3内に筒形ヒューズ4が内蔵されており、長期間の使用により電気コード12が損傷して、電気コード12の内外で電線が僅かに短絡した場合でも、微少な過電流により筒形ヒューズ4が直ちに溶断するため、過電流によるスパークを効果的に防止することができるとともに、火災の発生を未然に防止することができる。
【0013】
また、差込プラグ1は、ケース3が、筒形ヒューズ4を嵌め込むための設置凹部7を設けたケース本体3と、内側に把持突起11,11を設けたキャップ部材6とからなるものであり、設置凹部7内にヒューズホルダ8,8が設けられており、筒形ヒューズ4が、上下端縁際をヒューズホルダ8,8によって把持されることによって設置凹部7内に装着されているとともに、キャップ部材6が、設置凹部7内に装着された筒形ヒューズ4を把持突起11,11によって把持することによって、設置凹部7の開口部を覆っているため、キャップ部材6の着脱、および筒形ヒューズ4の着脱が非常に容易である。
【0014】
さらに、差込プラグ1は、キャップ部材6が、設置凹部7の開口部と略同一形状を有しており、設置凹部7の開口部際に嵌め込まれた状態で、設置凹部7の開口部を覆っているため、粗雑に取り扱われた場合でも、キャップの位置がずれず、キャップ部材6の内側の把持突起11,11が筒形ヒューズ4の位置をずらさないので、筒形ヒューズ4による過電流の防止効果が阻害されない。
【0015】
なお、本発明の差込プラグの構成は、上記した各実施例の態様に何ら限定されるものではなく、ケース、金属端子、ヒューズ等の形状・構造等の構成を、本発明の趣旨を逸脱しない範囲で、必要に応じて適宜変更できる。
【0016】
たとえば、ケースに内蔵されるヒューズは、電流ヒューズに限定されず、温度ヒューズでも良い。さらに、それらのヒューズを併用することも可能である。また、2個以上の電流ヒューズおよび/または温度ヒューズを内蔵する場合には、それらのヒューズを直列に接続することも可能であるし、並列に接続することも可能である。さらに、ケースの材質は、合成樹脂に限定されず、碍子等に変更することも可能である。加えて、キャップの内側に設ける把持突起の設置個数は、2個に限定されず、4個等に変更することも可能である。また、ヒューズホルダの形状も、上記実施形態の如き円弧状の把持片を向かい合わせた形状に限定されず、片持ち型の形状等の任意の形状に変更することができる。
【0017】
【発明の効果】
請求項1に記載された差込プラグは、合成樹脂製のケース内に筒形ヒューズ内蔵されており、電気コードが僅かに短絡しただけでも、ヒューズが微少な過電流を敏感に検知して直ちに溶断するため、過電流によるスパークを効果的に防止することができるとともに、火災の発生を未然に防止することができる。
また、ケースが、筒形ヒューズを嵌め込むための設置凹部を設けたケース本体と、設置凹部の開口部を覆うように取り付けられるキャップ部材とからなり、設置凹部内にヒューズホルダを設け、筒形ヒューズの上下端縁際をヒューズホルダで把持することによって筒形ヒューズを設置凹部内に装着可能とするとともに、キャップ部材の内側に、筒形ヒューズを把持可能な把持突起を設け、筒形ヒューズをヒューズホルダに把持させて設置凹部内に装着し、その筒形ヒューズを把持突起で把持することにより、キャップ部材が開口部を覆うように取り付けられるため、キャップ部材の着脱、および筒形ヒューズの着脱が非常に容易である。
さらに、設置凹部内でヒューズホルダの左右外側にキャップ部材の左右端縁部が当接可能な一対の段部を設ける一方、キャップ部材を、設置凹部の開口部と略同一形状に形成しており、キャップ部材がその左右端縁部を段部の前面に当接させた状態で開口部を覆うように取り付けられるため、粗雑に取り扱われた場合でも、キャップの位置がずれず、キャップ部材の内側の把持突起が筒形ヒューズの位置をずらさないので、筒形ヒューズによる過電流の防止効果が阻害されない。
【図面の簡単な説明】
【図1】差込プラグの正面を示す斜視図である。
【図2】差込プラグを分解して示す斜視図である。
【図3】差込プラグの電気回路を示す説明図である。
【図4】差込プラグを電気コードに取り付けた状態を示す説明図である。
【符号の説明】
1・・差込プラグ、2a,2b・・端子、3・・ケース、4・・筒形ヒューズ、5・・ケース本体、6・・キャップ部材。
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an insertion plug for plugging into an electrical outlet and supplying commercial power to an electric kotatsu heating element.
[0002]
[Prior art]
Conventionally, a breaker and a fuse are attached to a distribution board or the like in household electrical wiring in order to prevent damage to electric wires and electrical machinery equipment from overcurrent due to overload or short circuit. In the electric kotatsu, the heating element (electric heating section) is equipped with a thermal fuse for preventing overheating, but the power cord is equipped with a current fuse for preventing overcurrent due to overload or short circuit. It is not done.
[0003]
[Problems to be solved by the invention]
However, breakers and fuses attached to distribution boards in ordinary households are not cut off unless there is an overcurrent larger than the electrical capacity of individual household electrical appliances. In an electrical device that easily causes a slight short circuit, damage due to overcurrent cannot be effectively prevented.
[0004]
The object of the present invention is to provide an electric circuit that can react sensitively to cut off the circuit and minimize sparks due to overcurrent even if a slight overcurrent occurs due to a short circuit between the cords of the electric kotatsu. The object is to provide a plug for Kotatsu.
[0005]
[Means for Solving the Problems]
Among the configurations of the present invention, the configuration of the invention described in claim 1 is a plug formed by covering a metal terminal for supplying a commercial power source to an electric kotatsu heating element with a synthetic resin case. A plug, wherein the case includes a case body provided with an installation recess for fitting a cylindrical fuse, and a cap member attached to cover the opening of the installation recess, and the fuse is installed in the installation recess. A holder is provided, and the cylindrical fuse can be mounted in the installation recess by gripping the upper and lower edges of the cylindrical fuse with the fuse holder, and on the left and right outer sides of the fuse holder in the installation recess. While providing a pair of step parts with which the right and left end edges of the cap member can contact, the cap member is formed in substantially the same shape as the opening of the installation recess, A gripping projection capable of gripping the cylindrical fuse, and mounting the cylindrical fuse in the installation recess by gripping the cylindrical fuse, and gripping the cylindrical fuse with the gripping projection, said cap member is attached so as to cover the opening being in contact with the front surface of the stepped portion of the left and right edges, the cylindrical fuse is to be built into the case. Note that it is preferable to use a rush-resistant current fuse in order to prevent the current fuse from excessively detecting the inrush current when the switch is turned on and fusing.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the plug for electric kotatsu of the present invention (hereinafter simply referred to as a plug) will be described in detail with reference to the drawings.
[0007]
1 and 2 show a plug. The plug 1 is composed of metal terminals 2a and 2b, a case 3 made of an insulating synthetic resin having elasticity, a cylindrical fuse 4 and the like, and a pair of terminals 2a arranged in parallel. , 2b is covered with the case 3 around the base end portion.
[0008]
The case 3 is composed of a case body 5 in which the exposed edges of the terminals 2a and 2b are formed narrow and a flat cap member 6. The case body 5 is provided with an installation recess 7 by carving a substantially central portion deeply vertically. In addition, metal fuse holders 8 and 8 are projected in a pair in the installation recess 7, and the arc-shaped gripping pieces 13 and 13 are interposed between the fuse holders 8 and 8. They face each other to form a circle. The cylindrical fuse 4 is detachably installed by the fuse holders 8 and 8. Further, step portions 14 and 14 are formed outside the fuse holders 8 and 8 in the installation recess 7.
[0009]
On the other hand, the cap member 6 is integrally formed of a synthetic resin in substantially the same shape as the opening of the installation recess 7. At the center of the inside, two substantially arc-shaped gripping protrusions 11 and 11 are provided so as to be adjacent to each other along the width direction, and face each other so as to form a circle therebetween. Yes. The cap member 6 is detachably attached to the case body 5 by gripping the cylindrical fuse 4 installed in the installation recess 7 by the grip members 11, 11. Then, the cap body 6 is installed in the state where the right and left edges of the back surface are brought into contact with the front surfaces of the steps 14 and 14 of the installation recess 7 and fitted into the opening of the installation recess 7. The opening of the recess 7 is covered. [0010]
On the other hand, FIG. 3 shows an electrical circuit of the plug 1 in which the cylindrical fuse 4 built in the case 3 is connected in series with the terminal 2a on one side. It has become.
[0011]
As shown in FIG. 4, the plug 1 is used by being attached to the tip of the electric cord 12 in a state where the electric wires in the electric cord 12 for electric kotatsu are connected to the terminals 2a and 2b. A connecting member 13 for connecting to the electric kotatsu heating element is provided at the edge opposite to the plug 1, and a controller for adjusting the temperature of the electric kot heating element is provided at the center. is set up. In such an electric kotatsu using the electric cord 12, when the electric cord 12 is damaged due to long-term use and the electric wire is slightly short-circuited inside or outside the electric cord 12 (that is, a fuse of a domestic distribution board is Even when short-circuited to such an extent that it does not blow, the cylindrical fuse 4 sensitively detects a minute overcurrent and blows immediately.
[0012]
As described above, the plug 1 has the cylindrical fuse 4 built in the case 3 made of synthetic resin, and the electric cord 12 is damaged due to long-term use, and there are few electric wires inside and outside the electric cord 12. Even when a short circuit occurs, the cylindrical fuse 4 is immediately blown by a slight overcurrent, so that it is possible to effectively prevent a spark due to the overcurrent and prevent a fire from occurring.
[0013]
The plug 1 includes a case body 3 having a case body 3 provided with an installation recess 7 for fitting the cylindrical fuse 4 and a cap member 6 provided with gripping protrusions 11 and 11 on the inside. There are fuse holders 8, 8 provided in the installation recess 7, and the cylindrical fuse 4 is mounted in the installation recess 7 by being gripped by the fuse holders 8, 8 at the edges of the upper and lower ends. The cap member 6 covers the opening of the installation recess 7 by holding the cylindrical fuse 4 mounted in the installation recess 7 with the holding projections 11, 11. The fuse 4 can be easily attached and detached.
[0014]
Further, the plug 1 has the cap member 6 having substantially the same shape as the opening of the installation recess 7, and the opening of the installation recess 7 is inserted in the state of being fitted in the opening of the installation recess 7. Since the cover covers the cap, the position of the cap does not shift even when handled roughly, and the gripping projections 11, 11 inside the cap member 6 do not shift the position of the cylindrical fuse 4. The prevention effect is not hindered.
[0015]
The configuration of the plug according to the present invention is not limited to the above embodiments, and the configuration of the shape, structure, etc. of the case, metal terminal, fuse, etc., departs from the spirit of the present invention. As long as it is not necessary, it can be changed as needed.
[0016]
For example, the fuse built in the case is not limited to the current fuse, and may be a thermal fuse. Further, these fuses can be used in combination. Further, when two or more current fuses and / or temperature fuses are incorporated, these fuses can be connected in series or in parallel. Furthermore, the material of the case is not limited to the synthetic resin, but can be changed to a insulator or the like. In addition, the number of gripping protrusions provided on the inner side of the cap is not limited to two, and can be changed to four or the like. Further, the shape of the fuse holder is not limited to the shape in which the arc-shaped gripping pieces face each other as in the above embodiment, and can be changed to any shape such as a cantilever shape.
[0017]
【The invention's effect】
The plug according to claim 1 has a cylindrical fuse built in a case made of synthetic resin, and even if the electric cord is slightly short-circuited, the fuse detects a minute overcurrent sensitively and immediately. Since fusing, it is possible to effectively prevent sparks due to overcurrent and to prevent the occurrence of fire.
In addition, the case includes a case main body provided with an installation recess for fitting a cylindrical fuse, and a cap member attached so as to cover the opening of the installation recess. By holding the upper and lower edges of the fuse with the fuse holder, the cylindrical fuse can be mounted in the installation recess, and a gripping protrusion capable of gripping the cylindrical fuse is provided inside the cap member, Since the cap member is attached so as to cover the opening by gripping the fuse holder and mounting it in the installation recess, and gripping the cylindrical fuse with the gripping projection, the cap member is attached and detached and the cylindrical fuse is attached and detached. Is very easy.
In addition, a pair of stepped portions that can contact the left and right edge portions of the cap member are provided on the left and right outer sides of the fuse holder in the installation recess, while the cap member is formed in substantially the same shape as the opening of the installation recess. Since the cap member is attached so as to cover the opening with the left and right end edges abutting against the front surface of the stepped portion, the cap position does not shift even when handled roughly, and the inside of the cap member Since the gripping projection of the cylindrical fuse does not shift the position of the cylindrical fuse, the effect of preventing overcurrent by the cylindrical fuse is not hindered.
[Brief description of the drawings]
FIG. 1 is a perspective view showing the front of an insertion plug.
FIG. 2 is an exploded perspective view showing an insertion plug.
FIG. 3 is an explanatory diagram showing an electric circuit of the plug.
FIG. 4 is an explanatory view showing a state in which the plug is attached to the electric cord.
[Explanation of symbols]
1. Plug-in plug, 2a, 2b ... Terminal, 3. Case, 4. Cylindrical fuse, 5. Case body, 6. Cap member.

Claims (1)

電気こたつの発熱体へ商用電源を供給するための金属製の端子を合成樹脂製のケースで被覆してなる差込プラグであって、
前記ケースが、筒形ヒューズを嵌め込むための設置凹部を設けたケース本体と、前記設置凹部の開口部を覆うように取り付けられるキャップ部材とからなり、
前記設置凹部内にヒューズホルダを設け、前記筒形ヒューズの上下端縁際を前記ヒューズホルダで把持することによって前記筒形ヒューズを前記設置凹部内に装着可能とするとともに、前記設置凹部内で前記ヒューズホルダの左右外側に前記キャップ部材の左右端縁部が当接可能な一対の段部を設ける一方、
前記キャップ部材を、前記設置凹部の開口部と略同一形状に形成するとともに、その内側に、前記筒形ヒューズを把持可能な把持突起を設け、
前記筒形ヒューズを前記ヒューズホルダに把持させて前記設置凹部内に装着し、その前記筒形ヒューズを前記把持突起で把持することにより、前記キャップ部材がその左右端縁部を前記段部の前面に当接させた状態で前記開口部を覆うように取り付けられ、前記筒形ヒューズが前記ケース内に内蔵されることを特徴とする電気こたつ用差込プラグ。
A plug made by covering a metal terminal for supplying commercial power to a heating element of an electric kotatsu with a synthetic resin case,
The case comprises a case body provided with an installation recess for fitting a cylindrical fuse, and a cap member attached to cover the opening of the installation recess,
A fuse holder is provided in the installation recess, and the cylindrical fuse can be mounted in the installation recess by gripping the upper and lower edges of the cylindrical fuse with the fuse holder. While providing a pair of stepped portions on the left and right outer sides of the fuse holder with which the left and right end edges of the cap member can contact,
The cap member is formed in substantially the same shape as the opening of the installation recess, and a gripping protrusion capable of gripping the cylindrical fuse is provided on the inner side thereof,
The cylindrical fuse is gripped by the fuse holder and mounted in the installation recess, and the cylindrical fuse is gripped by the gripping projection so that the cap member has its left and right edge portions on the front surface of the stepped portion. being in contact attached to cover the opening, the electric kotatsu for the attachment plug, wherein the cylindrical fuse is built into the case.
JP2001076896A 2001-03-16 2001-03-16 Plug for electric kotatsu Expired - Lifetime JP4327374B2 (en)

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KR101845064B1 (en) 2016-10-25 2018-05-18 한국전력기술 주식회사 Instruments of portable plant frost protection device using a non-directional serial connector
US11973298B2 (en) 2018-09-27 2024-04-30 Worldconnect Ag Protection apparatus and travel adapter
IT201900005734A1 (en) * 2019-04-12 2020-10-12 Johnson Electric Asti S R L Electrical cable connector and method of making an electrical cable connector.
CN114006224B (en) * 2021-11-05 2024-04-16 山东钢铁集团日照有限公司 Double-insurance binding post capable of being replaced without stopping machine and using method thereof

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